/* Nắng Xanh - template nl-01 (thietkeweb.dev). Mobile-first, no framework */
:root{--navy:#0a2351;--navy2:#0e2f6b;--blue:#1a6bff;--blue-d:#1255d1;--sun:#ffc01f;--sun-d:#f0a900;--sky:#eaf2ff;--bg:#fff;--ink:#0d1b36;--muted:#586783;--line:#d9e3f5;--font:"Manrope",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;--head:"Space Grotesk","Manrope",system-ui,sans-serif;--hh:68px}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--hh) + 8px);-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);font-size:16px;line-height:1.6;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;overflow-x:clip}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{margin:0;font-family:var(--head);font-weight:700;line-height:1.1;letter-spacing:-.02em;text-wrap:balance}
h2{font-size:clamp(30px,4.6vw,46px)}h3{font-size:21px}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:3px solid var(--sun);outline-offset:2px}
[hidden]{display:none!important}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px;top:0;z-index:999;background:var(--sun);color:var(--navy);padding:10px 16px;font-weight:700}.skip:focus{left:10px;top:10px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:12px 24px;border-radius:12px;border:2px solid transparent;font-weight:700;font-size:15px;cursor:pointer;transition:background .2s,color .2s,transform .2s,box-shadow .2s;line-height:1.2;text-align:center}
.btn:hover{transform:translateY(-2px)}
.btn--sun{background:var(--sun);color:var(--navy)}.btn--sun:hover{background:var(--sun-d);box-shadow:0 12px 22px -12px var(--sun-d)}
.btn--blue{background:var(--blue);color:#fff}.btn--blue:hover{background:var(--blue-d);box-shadow:0 12px 22px -12px var(--blue)}
.btn--line{border-color:var(--navy);color:var(--navy);background:transparent}.btn--line:hover{background:var(--navy);color:#fff}
.btn--sm{min-height:42px;padding:8px 18px;font-size:14px}.btn--block{width:100%}
.eyebrow{display:inline-block;font-family:var(--head);font-size:13px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--blue);margin:0 0 10px}.eyebrow--sun{color:var(--sun)}
.chip{display:inline-block;background:rgba(255,192,31,.18);color:var(--sun);border:1px solid rgba(255,192,31,.5);border-radius:999px;padding:5px 14px;font-size:13px;font-weight:700;margin:0 0 18px}
.chip--l{background:var(--sky);color:var(--blue);border-color:var(--line);margin-bottom:12px}
.header{position:sticky;top:0;z-index:50;background:var(--navy);color:#fff}
.header__inner{display:flex;align-items:center;justify-content:space-between;height:var(--hh);gap:12px}
.logo{display:inline-flex;align-items:center;gap:10px;min-width:0}
.logo__mark{width:40px;height:40px;flex:none}
.logo__text{font-family:var(--head);font-size:22px;font-weight:700;line-height:1;display:flex;flex-direction:column;letter-spacing:-.01em}
.logo__text small{font-family:var(--font);font-size:10px;letter-spacing:.12em;text-transform:uppercase;font-weight:600;color:#9fb6e3;margin-top:5px;white-space:nowrap}
.header__actions{display:flex;align-items:center;gap:8px}.hdr-cta{display:none}
.burger{width:44px;height:44px;border:0;background:transparent;display:grid;place-content:center;gap:5px;cursor:pointer}
.burger span{display:block;width:22px;height:2px;background:#fff;border-radius:2px;transition:transform .3s,opacity .3s}
.menu-open .burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}.menu-open .burger span:nth-child(2){opacity:0}.menu-open .burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav{position:absolute;top:100%;left:0;right:0;background:var(--navy2);padding:6px 20px 22px;opacity:0;transform:translateY(-8px);visibility:hidden;transition:opacity .25s,transform .25s,visibility .25s}
.menu-open .nav{opacity:1;transform:none;visibility:visible}
.nav li a,.nav__tel{display:block;padding:14px 4px;font-weight:600;border-bottom:1px solid rgba(255,255,255,.12)}.nav__tel{color:var(--sun);border:0}
@media(max-width:480px){.logo__text small{display:none}}
@media(min-width:1040px){.nav{position:static;opacity:1;transform:none;visibility:visible;background:none;padding:0;display:flex;align-items:center;gap:24px}.nav ul{display:flex;gap:24px}.nav li a{border:0;padding:6px 0;font-size:14.5px;color:#d6e3ff}.nav li a:hover{color:var(--sun)}.nav__tel{display:none}.hdr-cta{display:inline-flex}.burger{display:none}}
/* hero */
.hero{position:relative;color:#fff;background:var(--navy);overflow:hidden}
.hero__bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero::before{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,rgba(10,35,81,.9),rgba(10,35,81,.82))}
@media(min-width:960px){.hero::before{background:linear-gradient(90deg,rgba(10,35,81,.96) 0%,rgba(10,35,81,.78) 48%,rgba(10,35,81,.2) 100%)}}
.hero__grid{position:relative;z-index:2;display:grid;gap:28px;padding-top:44px;padding-bottom:48px;align-items:center}
@media(min-width:960px){.hero__grid{grid-template-columns:1.1fr .9fr;gap:56px;padding-top:70px;padding-bottom:80px}}
.hero h1{font-size:clamp(40px,7.4vw,72px);margin-bottom:16px}.hero h1 em{font-style:normal;color:var(--sun);display:block}
.hero__lead{font-size:18px;color:#d6e3ff;max-width:520px}
.hero__pts{display:grid;gap:8px;margin-top:20px}.hero__pts li{display:flex;gap:10px;align-items:center;font-weight:600;font-size:15px}.hero__pts li::before{content:"";width:22px;height:22px;border-radius:50%;background:var(--sun) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M6 12.500l4 4 8-9' fill='none' stroke='%230a2351' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/16px no-repeat;flex:none}
.calc{background:#fff;color:var(--ink);border-radius:22px;padding:22px;box-shadow:0 30px 60px -28px rgba(0,0,0,.7);max-width:480px;width:100%}
.calc__tabs{display:grid;grid-template-columns:1fr 1fr;background:var(--sky);border-radius:12px;padding:4px;margin-bottom:18px}
.calc__tabs input{position:absolute;opacity:0}.calc__tabs span{display:block;text-align:center;padding:10px;border-radius:9px;font-weight:700;font-size:14.5px;cursor:pointer;color:var(--muted)}.calc__tabs input:checked+span{background:var(--blue);color:#fff}.calc__tabs input:focus-visible+span{outline:3px solid var(--sun)}
.calc__l{display:flex;justify-content:space-between;align-items:baseline;gap:10px;font-weight:700;font-size:14.5px;margin-bottom:10px}.calc__l output{font-family:var(--head);font-size:24px;color:var(--blue)}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:8px;border-radius:99px;background:linear-gradient(90deg,var(--blue) var(--pc,10%),#d9e3f5 var(--pc,10%));outline-offset:6px;margin:6px 0}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:28px;height:28px;border-radius:50%;background:var(--sun);border:4px solid #fff;box-shadow:0 2px 8px rgba(10,35,81,.45);cursor:pointer}
input[type=range]::-moz-range-thumb{width:22px;height:22px;border-radius:50%;background:var(--sun);border:4px solid #fff;box-shadow:0 2px 8px rgba(10,35,81,.45);cursor:pointer}
.calc__rg{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin-bottom:16px}
.calc__res{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:16px}.calc__res div{background:var(--sky);border-radius:14px;padding:12px 14px}.calc__res small{display:block;font-size:12px;color:var(--muted);font-weight:600}.calc__res b{font-family:var(--head);font-size:22px;line-height:1.15;color:var(--navy)}
.calc__n{font-size:12px;color:var(--muted);text-align:center;margin:10px 0 0}
.stats{background:var(--sun);color:var(--navy)}.stats__g{display:grid;grid-template-columns:1fr 1fr;gap:16px 10px;padding-top:26px;padding-bottom:26px}@media(min-width:800px){.stats__g{grid-template-columns:repeat(4,1fr)}}
.stats b{display:block;font-family:var(--head);font-size:clamp(26px,4vw,40px);line-height:1.1}.stats span{font-size:14px;font-weight:600}
.section{padding:72px 0}.section--sky{background:var(--sky)}
.head{display:flex;flex-direction:column;gap:18px;margin-bottom:32px}@media(min-width:800px){.head{flex-direction:row;justify-content:space-between;align-items:end}}
.tabs{display:inline-flex;background:var(--sky);border-radius:12px;padding:4px;align-self:flex-start}.tabs button{border:0;background:none;padding:10px 20px;border-radius:9px;font-weight:700;font-size:14.5px;color:var(--muted);cursor:pointer}.tabs button.is-on{background:var(--blue);color:#fff}
/* packages */
.pks{display:grid;gap:18px}@media(min-width:760px){.pks{grid-template-columns:repeat(3,1fr)}}
.pk{background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;display:flex;flex-direction:column;transition:transform .25s,box-shadow .25s}.pk:hover{transform:translateY(-4px);box-shadow:0 24px 40px -28px rgba(10,35,81,.6)}
.pk__img{position:relative;display:block}.pk__img img{width:100%;aspect-ratio:4/3;object-fit:cover}.pk__sys{position:absolute;left:12px;top:12px;background:var(--navy);color:#fff;font-size:12px;font-weight:700;padding:4px 10px;border-radius:999px}
.pk__b{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.pk__kw{font-family:var(--head);color:var(--blue);font-weight:600;margin:0;font-size:15px}.pk__kw b{font-size:46px;line-height:1;color:var(--navy);letter-spacing:-.03em}
.pk h3{margin:2px 0 4px}.pk__bill{color:var(--muted);font-size:14px;margin-bottom:12px}
.pk__s{margin-bottom:14px}.pk__s li{display:flex;justify-content:space-between;gap:10px;padding:7px 0;border-top:1px dashed var(--line);font-size:14px}.pk__s span{color:var(--muted)}
.pk__f{margin-top:auto;display:flex;align-items:end;justify-content:space-between;gap:10px}.pk__f small{display:block;font-size:12px;color:var(--muted)}.pk__f b{font-family:var(--head);font-size:22px;color:var(--navy)}
/* flow */
.flow{display:grid;gap:30px;align-items:center}@media(min-width:900px){.flow{grid-template-columns:1fr 1fr;gap:64px}}
.flow__ph{position:relative}.flow__ph img{width:100%;aspect-ratio:10/8;object-fit:cover;border-radius:22px}.flow__tag{position:absolute;right:14px;bottom:14px;background:var(--sun);color:var(--navy);font-weight:800;padding:8px 14px;border-radius:10px;font-family:var(--head)}
.steps{margin-top:22px;display:grid;gap:4px}.steps li{display:grid;grid-template-columns:46px 1fr;gap:14px;padding:12px 0}.steps b{width:46px;height:46px;border-radius:14px;background:var(--navy);color:var(--sun);display:grid;place-content:center;font-family:var(--head);font-size:22px}.steps h3{font-size:19px;margin-bottom:2px}.steps p{margin:0;color:var(--muted);font-size:15px}
/* compare */
.cmp{display:grid;gap:16px}@media(min-width:860px){.cmp{grid-template-columns:repeat(3,1fr);align-items:stretch}}
.cmp__c{position:relative;border:1.5px solid var(--line);border-radius:20px;padding:26px 22px;display:flex;flex-direction:column;gap:10px}.cmp__c--hot{background:var(--navy);color:#fff;border-color:var(--navy)}
.cmp__tag{position:absolute;top:-13px;left:22px;background:var(--sun);color:var(--navy);font-weight:800;font-size:12.5px;padding:4px 12px;border-radius:999px}
.cmp__p{font-family:var(--head);font-size:28px;font-weight:700;margin:0;color:var(--blue)}.cmp__c--hot .cmp__p{color:var(--sun)}
.cmp ul{display:grid;gap:8px;margin-bottom:10px;flex:1}.cmp li{padding-left:26px;position:relative;font-size:15px}.cmp li::before{content:"";position:absolute;left:0;top:5px;width:16px;height:16px;border-radius:50%;background:var(--sun)}
/* why */
.why{position:relative;color:#fff;background:var(--navy);overflow:hidden}.why__bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.3}
.why__in{position:relative;padding-top:72px;padding-bottom:72px;display:grid;gap:30px}@media(min-width:900px){.why__in{grid-template-columns:.9fr 1.1fr;gap:56px;align-items:center}}
.why__m{width:100%;max-width:440px;aspect-ratio:10/7;object-fit:cover;border-radius:18px;margin-top:22px;border:3px solid rgba(255,255,255,.3)}
.why__g{display:grid;gap:14px}@media(min-width:640px){.why__g{grid-template-columns:repeat(3,1fr)}}
.why__g div{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:18px;padding:18px;backdrop-filter:blur(6px)}.why__g b{font-family:var(--head);color:var(--sun);font-size:15px}.why__g h3{margin:4px 0 6px;font-size:19px}.why__g p{margin:0;font-size:14.5px;color:#d6e3ff}
/* survey */
.survey{display:grid;gap:30px;align-items:center}@media(min-width:900px){.survey{grid-template-columns:1fr 1fr;gap:64px}}
.survey__ph{position:relative}.survey__ph img{width:100%;aspect-ratio:10/8;object-fit:cover;border-radius:22px}.survey__ph p{position:absolute;left:14px;right:14px;bottom:14px;background:#fff;border-radius:14px;padding:12px 16px;margin:0;font-size:14.5px;box-shadow:0 14px 30px -14px rgba(0,0,0,.5)}.survey__ph b{display:block;font-family:var(--head);font-size:18px;color:var(--blue)}
.form{display:grid;gap:12px;background:var(--sky);border-radius:22px;padding:24px}.form h2{font-size:30px}
.field label,.roi label{display:block;font-weight:700;font-size:13px;margin-bottom:4px;color:var(--muted)}
.field input,.field select,.field textarea{width:100%;border:1.5px solid var(--line);border-radius:12px;padding:12px 14px;background:#fff;font-size:16px}
.field input[aria-invalid=true]{border-color:#d4372a}.err{display:block;color:#d4372a;font-size:12.5px}
.row2{display:grid;gap:12px}@media(min-width:520px){.row2{grid-template-columns:1fr 1fr}}
.form__ok{background:#dff5e3;color:#1c5a2b;border-radius:12px;padding:12px 14px;font-size:14.5px}
/* faq */
.faq{display:grid;gap:26px}@media(min-width:900px){.faq{grid-template-columns:.8fr 1.2fr;gap:64px}}
.faq details{background:#fff;border-radius:14px;margin-bottom:10px;padding:0 18px}
summary{list-style:none;cursor:pointer;padding:16px 34px 16px 0;font-family:var(--head);font-weight:600;font-size:18px;position:relative}summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:2px;top:50%;transform:translateY(-50%);font-size:26px;color:var(--blue);font-weight:500}details[open] summary::after{content:"\2212"}
details p{color:var(--muted);padding-bottom:16px;margin:0}
/* footer */
.footer{background:var(--navy);color:#c3d3f2;padding:54px 0 24px}
.footer__grid{display:grid;gap:28px}@media(min-width:800px){.footer__grid{grid-template-columns:1.4fr 1fr 1.2fr}}
.footer h3{font-family:var(--font);font-size:13px;letter-spacing:.14em;text-transform:uppercase;margin-bottom:12px;color:var(--sun)}.footer li{margin-bottom:8px;font-size:15px}.footer p{font-size:15px;margin-top:12px}.footer a:hover{color:var(--sun)}.logo--ft{color:#fff}
.footer__bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;border-top:1px solid rgba(255,255,255,.14);margin-top:30px;padding-top:18px;font-size:13px}.footer__bottom p{margin:0}
/* detail */
.sp{padding:20px 0 56px}
.bc{font-size:13px;color:var(--muted);margin:0 0 16px;display:flex;flex-wrap:wrap;gap:6px}.bc a{color:var(--blue);font-weight:700}
.sp__grid{display:grid;gap:28px}.sp__grid>*{min-width:0}@media(min-width:900px){.sp__grid{grid-template-columns:1fr 1fr;gap:56px;align-items:start}.gal{position:sticky;top:calc(var(--hh) + 20px)}}
.gal__main{position:relative;border-radius:22px;overflow:hidden;background:var(--sky)}.gal__main img{width:100%;aspect-ratio:4/3;object-fit:cover}.gal__kw{position:absolute;left:14px;bottom:14px;background:var(--sun);color:var(--navy);padding:8px 16px;border-radius:12px;font-weight:700;font-family:var(--head)}.gal__kw b{font-size:30px;line-height:1}
.spec{margin-top:14px;border:1px solid var(--line);border-radius:18px;overflow:hidden}.spec li{display:flex;justify-content:space-between;gap:14px;padding:12px 16px;border-bottom:1px solid var(--line);font-size:14.5px}.spec li:last-child{border:0}.spec li:nth-child(odd){background:var(--sky)}.spec span{color:var(--muted)}.spec b{text-align:right}
.sp h1{font-size:clamp(36px,5.4vw,56px)}.sp__code{font-size:13px;color:var(--muted);margin:4px 0 6px}
.sp__price{margin:8px 0 10px}.sp__price b{font-family:var(--head);font-size:40px;color:var(--blue);display:block;line-height:1.1}.sp__price small{color:var(--muted)}
.sp__lead{color:var(--muted)}
.pay{display:grid;grid-template-columns:1fr 1fr;gap:8px}.pay input{position:absolute;opacity:0}.pay span{display:block;text-align:center;border:1.5px solid var(--line);border-radius:12px;padding:11px;font-weight:700;font-size:14.5px;cursor:pointer}.pay input:checked+span{background:var(--blue);border-color:var(--blue);color:#fff}.pay input:focus-visible+span{outline:3px solid var(--sun);outline-offset:2px}
.pay__n{font-size:14px;color:var(--muted);margin:8px 0 18px}
.roi{background:var(--navy);color:#fff;border-radius:20px;padding:20px;margin-bottom:18px}.roi h2{font-size:24px;margin-bottom:14px}.roi label{display:flex;justify-content:space-between;gap:10px;align-items:baseline;color:#d6e3ff}.roi output{font-family:var(--head);font-size:22px;color:var(--sun)}
.roi input[type=range]{background:linear-gradient(90deg,var(--sun) var(--pc,50%),rgba(255,255,255,.25) var(--pc,50%))}
.roi__r{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:14px 0 8px}.roi__r div{background:rgba(255,255,255,.1);border-radius:12px;padding:10px}.roi__r small{display:block;font-size:11.5px;color:#b9cdf3;line-height:1.3}.roi__r b{font-family:var(--head);font-size:18px;line-height:1.2;color:#fff;display:block;margin-top:2px}
.roi__n{font-size:13.5px;color:#d6e3ff;margin:0}
.order{display:grid;gap:12px;margin:0 0 12px;background:var(--sky);border-radius:20px;padding:20px}.order h2{font-size:24px}
.sp__btns{display:flex;flex-wrap:wrap;gap:8px}.sp__btns .btn{flex:1 1 140px}
.h2s{font-size:32px;margin:44px 0 14px}
.inc{display:grid;gap:10px}@media(min-width:700px){.inc{grid-template-columns:1fr 1fr}}.inc li{background:var(--sky);border-radius:12px;padding:12px 16px 12px 44px;position:relative;font-weight:600;font-size:15px}.inc li::before{content:"";position:absolute;left:14px;top:50%;width:20px;height:20px;transform:translateY(-50%);border-radius:50%;background:var(--sun) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M6 12.500l4 4 8-9' fill='none' stroke='%230a2351' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/14px no-repeat}
.rel{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}@media(min-width:900px){.rel{grid-template-columns:repeat(4,1fr)}}.rel a{display:block}.rel img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:16px}.rel span{display:block;font-family:var(--head);font-weight:700;margin-top:8px;line-height:1.2}.rel small{display:block;font-family:var(--font);font-weight:500;color:var(--muted);font-size:13.5px}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important;scroll-behavior:auto!important}}